Donut tutorial : Unexpected lighting behavior
It looks as though your wall is looking the wrong way. Have you tried rotating it by 180 degrees?
For future reference, read up on the topic &quot;normals&quot;
Edit:
Ok, I got it now, sorry for the false lead earlier:
You plugged the texture for the brick wall relief directly into the normal port of your shader.
You need to put a &quot;Bump&quot;-Node (Add-&gt; Vector -&gt; Bump) in between, like so: